Duplicates in channels_db since 8.3.0

[alex-ruehe]

I noticed some new behaviour with asammdf 8.3.0: The channels_db contains "duplicate" entries in the form of
'Signal.X': ((1, 2),), 'X': ((1, 2),), - basically one version is prefixed with Signal and the other is not. This happens for many channels. I guess this comes from changes being introduced in 0dc4e2e and everything being then added to channels_db here https://github.com/danielhrisca/asammdf/blob/master/src/asammdf/blocks/mdf_v4.py#L1044-L1046

Is this expected behaviour or a bug?